Problem: Which one of the following chemical equations is balanced? a. 2Na + S → 2NaS b. NH3 + H2O → 2NH4OH c. KOH + H2SO4 → KHSO4 + H2O d. 2NaCl + H2SO4 → HCl + NaSO4

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Problem Details

Which one of the following chemical equations is balanced? 

a. 2Na + S → 2NaS 

b. NH3 + H2O → 2NH4OH 

c. KOH + H2SO4 → KHSO4 + H2

d. 2NaCl + H2SO4 → HCl + NaSO4

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